`class PushPromiseFrame`

The PUSH_PROMISE frame is used to notify the peer endpoint in advance of streams the sender intends to initiate. The PUSH_PROMISE frame includes the unsigned 31-bit identifier of the stream the endpoint plans to create along with a set of headers that provide additional context for the stream.

+---------------+ |Pad Length? (8)| +-+-------------+-----------------------------------------------+ |R| Promised Stream ID (31) | +-+-----------------------------+-------------------------------+ | Header Block Fragment () ... +---------------------------------------------------------------+ | Padding () ... +---------------------------------------------------------------+

Definitions

`def unpack`

Unpack the promised stream ID and header block fragment.

Signature

returns　Array: An array containing the promised stream ID and header block data.

Implementation

def unpack
	data = super
	
	stream_id = data.unpack1(FORMAT)
	
	return stream_id, data.byteslice(4, data.bytesize - 4)
end

`def pack(stream_id, data, *arguments, **options)`

Pack the promised stream ID and header block data into the frame.

Signature

parameter　stream_id　Integer: The promised stream ID.
parameter　data　String: The header block data.
parameter　arguments　Array: Additional arguments.
parameter　options　Hash: Options for packing.

Implementation

def pack(stream_id, data, *arguments, **options)
	super([stream_id].pack(FORMAT) + data, *arguments, **options)
end

`def apply(connection)`

Apply this PUSH_PROMISE frame to a connection for processing.

Signature

parameter　connection　Connection: The connection to apply the frame to.

Implementation

def apply(connection)
	connection.receive_push_promise(self)
end